Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On June 21 in CHICAGO the average high temperature is 78.5 °F (25.8 °C). The lowest recored high temperature was 61.5 °F (16.4 °C) in 2019 and the highest recored high temperature was 96.6 °F (35.9 °C) in 2022. The high temperature is usually* between 72.4 °F (22.4 °C) and 84.7 °F (29.3 °C). About a quarter of the time, the high temperature is less than 72.4 °F (22.4 °C), and another quarter of the time, the high temperature is greater than and 84.7 °F (29.3 °C). About 95% of the time, the high temperature has been between 60.6 °F (15.9 °C) and 96.4 °F (35.8 °C).
Low Temperatures
On June 21 in CHICAGO the average low temperature is 66.0 °F (18.9 °C). The lowest recored low temperature was 54.9 °F (12.7 °C) in 2019 and the lowest recored low temperature was 78.8 °F (26.0 °C) in 2022. The low temperature is usually* between 61.9 °F (16.6 °C) and 70.1 °F (21.2 °C). About a quarter of the time, the low temperature is less than 61.9 °F (16.6 °C), and another quarter of the time, the low temperature is greater than and 70.1 °F (21.2 °C). About 95% of the time, the low temperature has been between 54.1 °F (12.3 °C) and 77.9 °F (25.5 °C).
Frost
On June 21 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.0% of the time.
Data Source(s)
The data used to compute the average high/low temperatures for this location were taken from the following stations:
- CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 to 2025